aistudio-wpf-diagram/Live-Charts-master/Examples/Wpf/PieChart/PieChartExample.xaml.cs

using System;
using System.Windows.Controls;
using LiveCharts;
using LiveCharts.Wpf;

namespace Wpf.PieChart
{
    public partial class PieChartExample : UserControl
    {
        public PieChartExample()
        {
            InitializeComponent();

            PointLabel = chartPoint =>
                string.Format("{0} ({1:P})", chartPoint.Y, chartPoint.Participation);

            DataContext = this;
        }

        public Func<ChartPoint, string> PointLabel { get; set; }

        private void Chart_OnDataClick(object sender, ChartPoint chartpoint)
        {
            var chart = (LiveCharts.Wpf.PieChart) chartpoint.ChartView;
            
            //clear selected slice.
            foreach (PieSeries series in chart.Series)
                series.PushOut = 0;

            var selectedSeries = (PieSeries) chartpoint.SeriesView;
            selectedSeries.PushOut = 8;
        }
    }
}